I'm preparing to set up and do a fishless cycle on a nano tank (5.5 gal) and need to source a rock or rocks as hardscape. I'm going for a simple carpeted look for the flora and want a rock or some rocks that shoot up from the substrate. Obviously river rock would be easy to source, but I want something more worn / jagged for character. Rather than buying some soulless rock from a store, I thought it would be cool to source something local from nature. Anyone have any suggestions on where to go? I haven't tried a local landscape company yet, but that would't necessarily be local. Is there any type of rock that's specific to area? I live in Monument if that helps.